diff options
| -rw-r--r-- | target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c index 7487567ed5..56bcff31c2 100644 --- a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c +++ b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_bcm_wfi.c @@ -37,6 +37,10 @@ #define UBI_MAGIC 0x55424923 +#define CFE_MAGIC_PFX "cferam." +#define CFE_MAGIC_PFX_LEN (sizeof(CFE_MAGIC_PFX) - 1) +#define CFE_MAGIC "cferam.000" +#define CFE_MAGIC_LEN (sizeof(CFE_MAGIC) - 1) #define SERCOMM_MAGIC_PFX "eRcOmM." #define SERCOMM_MAGIC_PFX_LEN (sizeof(SERCOMM_MAGIC_PFX) - 1) #define SERCOMM_MAGIC "eRcOmM.000" @@ -250,6 +254,111 @@ static struct mtd_part_parser mtdsplit_bcm_wfi_parser = { .type = MTD_PARSER_TYPE_FIRMWARE, }; +static int cferam_bootflag_value(const char *name, size_t name_len) +{ + int rc = -ENOENT; + + if (name && + (name_len >= CFE_MAGIC_LEN) && + !memcmp(name, CFE_MAGIC_PFX, CFE_MAGIC_PFX_LEN)) { + rc = char_to_num(name[CFE_MAGIC_PFX_LEN + 0]) * 100; + rc += char_to_num(name[CFE_MAGIC_PFX_LEN + 1]) * 10; + rc += char_to_num(name[CFE_MAGIC_PFX_LEN + 2]) * 1; + } + + return rc; +} + +static int mtdsplit_parse_bcm_wfi_split(struct mtd_info *master, + const struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +{ + loff_t cfe_off; + loff_t img1_off = 0; + loff_t img2_off = master->size / 2; + loff_t img1_size = (img2_off - img1_off); + loff_t img2_size = (master->size - img2_off); + loff_t active_off, inactive_off; + loff_t active_size, inactive_size; + uint8_t *buf; + char *cfe1_name = NULL, *cfe2_name = NULL; + size_t cfe1_size = 0, cfe2_size = 0; + int ret; + int bf1, bf2; + + buf = kzalloc(master->erasesize, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + cfe_off = img1_off; + ret = jffs2_find_file(master, buf, CFERAM_NAME, CFERAM_NAME_LEN, + &cfe_off, img1_size, &cfe1_name, &cfe1_size); + + cfe_off = img2_off; + ret = jffs2_find_file(master, buf, CFERAM_NAME, CFERAM_NAME_LEN, + &cfe_off, img2_size, &cfe2_name, &cfe2_size); + + bf1 = cferam_bootflag_value(cfe1_name, cfe1_size); + if (bf1 >= 0) + printk("cferam: bootflag1=%d\n", bf1); + + bf2 = cferam_bootflag_value(cfe2_name, cfe2_size); + if (bf2 >= 0) + printk("cferam: bootflag2=%d\n", bf2); + + kfree(cfe1_name); + kfree(cfe2_name); + + if (bf1 >= bf2) { + active_off = img1_off; + active_size = img1_size; + inactive_off = img2_off; + inactive_size = img2_size; + } else { + active_off = img2_off; + active_size = img2_size; + inactive_off = img1_off; + inactive_size = img1_size; + } + + ret = parse_bcm_wfi(master, pparts, buf, active_off, active_size, true); + + kfree(buf); + + if (ret > 0) { + struct mtd_partition *parts; + + parts = kzalloc((ret + 1) * sizeof(*parts), GFP_KERNEL); + if (!parts) + return -ENOMEM; + + memcpy(parts, *pparts, ret * sizeof(*parts)); + kfree(*pparts); + + parts[ret].name = "img2"; + parts[ret].offset = inactive_off; + parts[ret].size = inactive_size; + ret++; + + *pparts = parts; + } + + return ret; +} + +static const struct of_device_id mtdsplit_bcm_wfi_split_of_match[] = { + { .compatible = "brcm,wfi-split" }, + { }, +}; + +static struct mtd_part_parser mtdsplit_bcm_wfi_split_parser = { + .owner = THIS_MODULE, + .name = "bcm-wfi-split-fw", + .of_match_table = mtdsplit_bcm_wfi_split_of_match, + .parse_fn = mtdsplit_parse_bcm_wfi_split, + .type = MTD_PARSER_TYPE_FIRMWARE, +}; + static int sercomm_bootflag_value(struct mtd_info *mtd, uint8_t *buf) { size_t retlen; @@ -370,6 +479,7 @@ static struct mtd_part_parser mtdsplit_ser_wfi_parser = { static int __init mtdsplit_bcm_wfi_init(void) { register_mtd_parser(&mtdsplit_bcm_wfi_parser); + register_mtd_parser(&mtdsplit_bcm_wfi_split_parser); register_mtd_parser(&mtdsplit_ser_wfi_parser); return 0; |